The first screenshots appeared on 1 Oct, the first diary at 15 Oct, and nothing else so far. Hence, I would guess that we probably see screenies on every 1st of a month, and a new diary on every 15th.The Great Duck said:Every Wednesday,I presume,although there will be some longer periods of waiting during the holidays.
Likely, a more precise answer would be that they arrive precisely when Johan means them to do.